Insulator.



A 110.831,168. PATENTBD SEPT.18, 1906.

A, .1. L. LEMBBGK.

INSULATOR.

APPLICATION FILED .2" 1904. x L A w o' fx am .af/@i5 tions.

UNITD STATES PATENT OFFICE.

AnrI-IUII J. L. LEMBEOII, or sIOUx OITY, IOWA, AssIeNoR or ONE-HALF roJOHN P. WALL, or sIoUx OITY, IOWA.

INSULATOR.

Specification of Letters Patent.

v Patented Sept. 18` 1906.

Application filed November 26,1904. Serial No. 234.412.

To all whom `t mfc/y concern:

Be it known that I, ARTHUR J. L. LEM- nnoic, a citizen oi the UnitedStates, residing at Sioux City, in the county of Woodbury and State oiIowa, have invented new and useful Improvements in Insulators, of whichthe following is a speci'lication.

This linvention relates to insulators for use in connecting up call andfire-alarm boxes, electric lights, &c., to line-wires, and particularlypertains to what may be termed a drop-insulator, whereby the connectionbetween the 'main line and the call and firealarm box, electric light,or the like may be established without imposing a strain on theline-wire or requiring when a test of the connected apparatus is desiredto detach any part of the main line or the connecting linewires, andthus permit the necessary tension on said wires to remain undisturbedwith obvious advantages in repair-work, as 'well as in primaryassemblage of the said connec- The improved insulator is constructed intwo forms, one having a single skirt or petticoat with two heads inplanes at right angles to each other and the other having a double skirtor petticoat with two heads lin planes at right angles to each other.

A 'further object in the use of the dropinsulator is that it can be a Aplied at one operation to the cross-arm o' a pole, post, or otheranalogous device and by such action is rendered both economical instructure and labor-saving in application with respect to the olddevice, wherein a lineman is required to individually secure insulatorsto a crossarm or similar device, and a number of knobs mustnecessarilybe used to accommodate the connections required in setting up anassembled relation with respect to the main-line wire.

In the drawings, Figure l is an elevation of a portion of a main linewith drop-wires leading to a call-box and showing the applicationthereto of the improved insulator. Fig. 2 is a detail elevation, on anenlarged scale, of the simplified 'form of the insulator.l Fig. 3 is avertical section through the insulator shown by Fig. 2. Fig. 4 is avertical sectional view of the other form oi insulator having the doubleskirt or petticoat.

Similar characters oi reference are employed to indicate correspondingparts in the several views.

Referring to Figs. 1, 2, and 3 of the drawings, l indicates a main headhaving a circumferential groove 2 and a skirt or petticoat 3, ascrew-threaded socket 4 being formed in the skirt or petticoat oi' theusual gage to iit over pins now commonly used on cross-arms or othersupporting parts of poles and like devices to which insulators areapplied. In the simplied form of the insulator, or that used forlow-voltage connections, a knob 5 is secured to an intermediate portionof the skirt or petticoat 3 and has a circumferential groove 6, saidknob Storming a secondary head, which is disposed in a plane at rightangles to the main head l. This secondary head is preferably of lessdiameter than the main head and located tar Venough below the groove 2as to avoid the least interference with the attachment of the mainlinewire to the main head or the application of' the drop-wire, which willbe more fully hereinafter' referred to, to the secondary head.

In the form shown in Fig. 4 the construction is the same as that shownin Figs. l, 2, and 3, with the exception that a double skirt orpetticoat is provided, one of the skirts or petticoats being indicatedby the reference character 7 and the other by the reference character S.Otherwise than that, as stated, the insulator shown in Fig. 4 isconstructed the same as that shown in Figs. 1,2, and 3, the samereference characters being applied thereto.

' Both forms of the device are intended to be constructed of glass,porcelain, or other suitable yinsulating material, and the mainadvantage derived from the specific construction set Vforth is that boththe attaching elements, or those parts to which connections are secured,and the main body or element comprising the skirt or petticoat or skirtsor petticoats and head 1, are simultaneously applicable to a single pinon an arm or analogous device to dispose the insulator as an entirety ineither form in operative position. The essential feature of the improvedinsulator is the disposition of two attaching elements or members inplanes at right angles to each other, the upright member, including theskirt or petticoat or skirts or petticoats and head l, having the end ofthe line-wire secured thereto and remaining dead, and the otherattaching element or member, including IOO the knob 5, receives theconnecting or drop wire for the call-box, electric-light, fire-alarm orother apparatus, as clearly shown by Fig. l. In the preferredarrangement of the insulators on an arm between the line, which isdesignated by A, and the call-box or other apparatus B the connectionsor drop-wires C between said call-box or other apparatus are attached tothe horizontal elements or members of the insulators and the line-wireterminals are secured to the heads 1, two of the insulators being usedand spaced apart a sufficient distance and the circuit continued betweenthe connections C and the line-wire ruiming to and leading away from therespective insulators by leaving a sufficient length of the saidconnections after attachment to the horizontal elements or members andterminally attaching said lengths to the mainline wires. In thearrangement of the insulators on the arm D, adapted for their supportand held by a pole or standard E, as shown, the horizontal elements ormembers of the insulators are projected outwardly for convenience inattachment thereto of the connections C. In the event that it is desiredto test the apparatus connected to the line, such as the call-box B, itis unnecessary to disturb the main iine or the attached terminals of theconnections C with respect to the main line, as the call-box or otherdevice may be thrown out of circuit by detaching the lower terminals ofthe connections C. After the test has been completed the callbox orother device may be readily thrown into the main line or in circuit withthe latter by reattaching thelower terminals of the connections C.

From the foregoing it will be apparent that the tension of the main-linewire remains constant and is not in the least disturbed during theassemblage of apparatus in operative relation thereto or indisconnecting said apparatus.

A further advantage in the improved insulator construction is that theexpense of using a number of auxiliary knobs or insuating devices isobviated.

It will also be understood that changes in the proportions anddimensions of the several parts of the insulator may be resorted towithout departing from the spirit of the invention.

Having thus described the invention, what is claimed as new isl. Aninsulator having two integrally-connected members of differentdimensions arranged in planes at right angles to each other to receivewire terminals also having an angular relation to each other, theinsulator as an entirety being composed of non-conducting material.

2. An insulator having two integrally-connected members arranged inplanes at right angles to each other, a line-wire and connectionsattached to the respective members, the connections being continued froma partof the members to the line-wire but independently separable withrespect to the latter and the said members, and an electrical apparatusto which said connections lead.

3. An insulator having two integrally-connected members of differentdimensions disposed in planes at right angles to each other, bothmembers being provided with grooved terminals and simultaneouslyapplicable to a supporting means, the smaller member projectingoutwardly from the side of the body of the larger member.

4t. An insulator having two integrally-connected members of differentdimensions disposed in planes at right angles to each other', the twomembers being simultaneously applicable to a supporting means andadapted to be held in secured position by a single pin,

5. A supporting means having insulators thereon spaced apart from eachother, each insulator consisting of two members directly connected anddisposed in planes at right angles to each other, combined withmain-line terminals connected to the upright members of the insulators,and connections for an electrical apparatus engaging the horizontalmembers and also separably attached to the main line.

6. The combination with a supportingarm, of insulators secured thereonin opposite directions, cach of the insulators consisting of twointegrally-connected members arranged in planes at right angles to eachother and of different dimensions, the smaller member projectingoutwardly from the larger member, a line-wire having the terminalsthereof attached to the larger members of the opposite insulators,connections attached to the smaller outwardly-projecting members andcontinued to the line-wire but independently separable with respect tothe latter and said members, and an electrical apparatus to which saidconnections lead.

7 An insulator having arms presented at an angle to each other, each ofsaid arms having a circumferential groove to receive conducting-wires,and one of said arms having an opening to receive a support for theinsulator.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

ARTHUR J. L. LEMBECK.

Titnesses A. J. PnUvor, JOHN l?. W'ALL.

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